Alien Robots

I would LOVE for e.t. life to exist, but thinking along the lines of robotics etc, it really does stretch the friendship as to why an e.t. species would come to earth in big conspicuous glowing ufos, when even in our day and age the NSA has robotic dragonflies with built in lens that transmitted to a remote location, that seriously look 100% legit and have had them for years?

If this species were advanced enough to cover the HUGE distances in space, they would surely be ahead of us in technology, in which case, regardless of whether you are here to study us, or gather intelligence to wipe us out or enslave us, doesn't common sense dictate you would use covert surveillance techniques so you aren't noticed? ie: robotic insects or seemingly inanimate objects that totally fit in with human surroundings so you can watch us covertly? What govt. base is going to go on red alert because a cockroach is crawling through their ventillation system?

re: Cenobites ( the Hellraiser pic a couple of posts ago )

har! Well, they are summonsed up by messing about with a Chinese puzzle box, which configurates into a Leviathan diamond shape, and opens up a dimensional door to an Underworld based on pleasure = pain,

so - it does sound a lot like the plastic surgery options to being cyberneticly enhanced.........